add setup.py and stuff so I can put stapler on pypi

Signed-off-by: Philip Stark <git@codechaos.ch>
add license to setup.py.. whoops sorry

Signed-off-by: Philip Stark <git@codechaos.ch>
mmm, PEP8

Signed-off-by: Philip Stark <git@codechaos.ch>
small adjustments and substituting .format for % string formatting